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�CV BY�CRCUF FOUP.� :NC� �;-1'-5� � 1;5i'rM �E`.'tSETT 5UI:CING CEP� 2D63.2:8�9�w" 2 <br />4.11 OILf MIATER $BPARllTION AND 6RIT REISOVAL � <br />For �tormwater treetment ths v�ult �hall provide e talnimum of a IS <br />slnat� retention tlme at th� rate of tha v�ult inlet c�p�city. <br />For atoztm+nter treatment the vault inlet CapaCity ahell b� determi�ed <br />by use of ths rational fot'c�ula, Q- oia. The Snter.slty for use in <br />the rationai forsnula shell be 0.5 in/hr. <br />Spill coatatnment vaults she17. provide a minimw�a "live• espacity of <br />2500 gallons, <br />8ypaes piping ehall not �e allowed for epill containmeae vaults. <br />CoaleEeing platee eey Up zequirod :or eites vith e high rlck of large <br />volume Fpilln or discl:erges, <br />For otorm�ster treatment a bypass piping eyr•tem shall be ueed to <br />divert axcess ilov around che vyult vhen the lr.flov rate e�:eeeda the <br />capaeity o£ the vault inle�:. <br />For spill contairvoent, vaults shall be equipped �:Sth a� isolation <br />valve, <br />Spill cont�inment veults shall d�acharge ir.to the sanitary �eWer <br />cycteA. ,v <br />4.11.1 lSAINTErAtiCE <br />The o11%L�ater sepe±atoi ehrll be ehecl:e3 f:equet�tly by the propezty <br />o+.-ner or msnager ar.d clesned wneaever oil aecu.�uiatione exceed 0.5 <br />inehes nr,�tiha:e in the sepaTatot. <br />The separatot ahall a?kcys ba cleer.ed in eaTly October to rert�ova <br />matcrial that has aacua:ulated dcring the dry season ��d egaln after <br />the firsc significant rain:all of the fall/winter (sore. thzn 0.5 Sneh <br />1n i4 hcurs. At a uinim•sm, the aeperetor sheil te cleaned onca agaln <br />in the spring. <br />011/�ater aeperators £or high rick sStec, or those diecharging to <br />sensltivn surface waters, flay requlre mor� frequer.� mair�tenance. <br />4.12 OPEN CHI�NNSLS <br />Points of dischazge froe culverts or storm eevers into any lash <br />cha:mel shall be protocted from erosio� by mesne of rip sap, sp <br />boerde, stllling vella, end/or edequate vegEtati�e cover. <br />`/ <br />IV•12 <br />